EP3383567A1 - Entkernhammer zum entkernen von gusswerkstücken - Google Patents
Entkernhammer zum entkernen von gusswerkstückenInfo
- Publication number
- EP3383567A1 EP3383567A1 EP18719408.9A EP18719408A EP3383567A1 EP 3383567 A1 EP3383567 A1 EP 3383567A1 EP 18719408 A EP18719408 A EP 18719408A EP 3383567 A1 EP3383567 A1 EP 3383567A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- piston
- entkernhammer
- bearing sleeve
- hammer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005266 casting Methods 0.000 title claims abstract description 8
- 238000009527 percussion Methods 0.000 claims description 81
- 239000000463 material Substances 0.000 claims description 29
- 239000004033 plastic Substances 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 238000005461 lubrication Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000009749 continuous casting Methods 0.000 claims description 4
- 230000035559 beat frequency Effects 0.000 claims description 3
- 239000003570 air Substances 0.000 description 30
- 238000007789 sealing Methods 0.000 description 18
- 230000008901 benefit Effects 0.000 description 17
- 239000011324 bead Substances 0.000 description 5
- 238000013016 damping Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004605 External Lubricant Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000004954 Polyphthalamide Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229920006375 polyphtalamide Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000012791 sliding layer Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/001—Removing cores
- B22D29/005—Removing cores by vibrating or hammering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/02—Percussive tool bits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/26—Lubricating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/0011—Details of anvils, guide-sleeves or pistons
- B25D2217/0019—Guide-sleeves
Definitions
- the invention relates to a decoring hammer for coring castings.
- a coring hammer for coring castings is known.
- the decoring hammer has a housing, a quill and an impact piston received in the quill.
- WO2014 / 056014A1 another coring hammer is known.
- coring hammers known from WO2015 / 189757A1 and WO2014 / 056014A1 have a very short service life or high maintenance intensity.
- the supplied air must be mixed with a lubricant to allow lubrication of the percussion piston in Entkernhammer.
- Object of the present invention was to overcome the disadvantages of the prior art and to provide a Entkernhammer with increased life. This object is achieved by a Entkernhammer according to the claims.
- a decoring hammer is designed for coring workpieces.
- the gutter hammer includes:
- a sleeve slidably received in the housing with a quill arranged on the quill;
- Self-lubricating property in particular of a plastic material is formed.
- the advantage here is that in the receiving space of the sleeve no separate sliding layer must be attached.
- the sliding surface, for slidably receiving the percussion piston is formed by a coating which is formed in the receiving space of the quill.
- a bearing sleeve is arranged, wherein on an inner side of a bearing sleeve shell, the sliding surface is designed for slidably receiving the percussion piston.
- the bearing sleeve comprises a plastic material.
- a plastic material can have good self-lubrication properties.
- Such a plastic material having a self-lubricating property may be, for example, polytetrafluoroethylene.
- the plastic sleeve is formed from a glass fiber reinforced polyphthalamide. The glass fiber content may preferably be between 30% by volume and 60% by volume. In particular, it is conceivable that the plastic sleeve is made in one piece in an injection molding process.
- the percussion piston has a piston head and a piston body, wherein on the piston body the piston head frontally opposite a striking surface is formed, which cooperates with the hammer, a diameter of the piston head is greater than a Diameter of the piston body and wherein between the piston body and the piston head an end face arranged annular surface is formed.
- the piston head is guided in the sliding surface of the bearing sleeve and the bearing sleeve has an end wall with a passage opening through which the piston body protrudes, wherein an annular space is formed between the end wall of the bearing sleeve and the piston head.
- the advantage here is that the percussion piston can be acted upon by this design of the frontally arranged annular surface of both sides with compressed air to move the percussion piston in both directions can.
- a flow channel is formed in the percussion piston, which extends from a lateral surface of the piston body to an end face of the piston head.
- the housing has a housing main body which is formed from a continuous casting profile, in particular from an aluminum continuous casting profile.
- a first closure lid and a second closure lid are arranged on the housing main body, wherein in the second closure lid, a passage opening is formed, through which the quill is passed.
- the closure lid can be designed as independent components and thus can be prepared for example by mechanical processing.
- the gas inlet opening is formed in the first closure lid and for the gas outlet opening to be formed in the second closure lid.
- the advantage here is that the Entkernhammer can be connected by means of the gas inlet or gas outlet openings to a compressed air system.
- the bearing sleeve has a bearing sleeve shell penetrating gas flow opening.
- an at least partially encircling groove is formed on an outer side of the bearing sleeve shell, which groove is arranged in the region of the gas flow opening of the bearing sleeve.
- the advantage here is that the bearing sleeve does not have to be used in a certain angular position in the receiving space of the quill by this measure. Due to the at least partially encircling groove, the gas jacket opening penetrating the bearing sleeve casing can be flowed through by the compressed air in any installed position of the bearing sleeve.
- the sleeve has a Pinolenkopf and a Pinolenanalysis, wherein the Pinolen redesign the Pinolenkopf opposite the hammer is arranged, wherein a diameter of the Pinolenkopfes is greater than a diameter of the Pinolen- body and wherein between Pinolenanalysis and Pinolenkopf an end face arranged annular surface is trained.
- a return spring in the form of a helical spring can be arranged on the annular surface formed between Pinolenkopf and pinole body, which serves to restore the quill after switching off the compressed air.
- a helical spring can also be provided that below the annular surface a pressure chamber is formed and therefore the spring function is realized by pneumatics.
- a Pinolenmantel penetrating gas flow opening is formed in Pinolenkopf, wherein on a jacket outside of the quill extending from the gas flow opening to the front side of the quill head Flow recess is formed.
- the advantage here is that with only one compressed air connection, the quill can be pushed forward and the percussion piston can be set in an oscillating motion.
- a sensor is arranged on the housing, by means of which the position of the quill can be determined. By this measure, for example, the compressed air can be switched off if the sleeve would extend too far.
- the sensor may be formed, for example in the form of a Hall sensor.
- the quill is formed of a steel material which can be detected by the sensor.
- the quill is formed from an aluminum material and has an insert made of a steel material, which can be detected by the sensor.
- a permanent magnet is arranged in the quill, which is detected by a sensor.
- a gas line is connected to the gas outlet opening, wherein a pressure sensor is arranged on the gas line, by means of which the impact frequency of the percussion piston can be determined. The advantage here is that detected by this measure the beat frequency of the percussion piston or thereby can be varied by adjusting the pressure.
- the receiving space of the quill is closed with a sealing plug, wherein the sealing plug is fastened by means of a screw thread in the receiving space of the quill.
- the advantage here is that by this measure the receiving space of the quill for maintenance is easily accessible and wear parts can be easily replaced.
- the sealing plug is designed in the form of a simple disc, which is inserted in the receiving space of the quill and is held in position by means of the retaining ring.
- the percussion piston has a sheath and a core, wherein the core is formed from a material which has a higher density than the density of the material from which the sheath is formed.
- the core is formed from a material which has a higher density than the density of the material from which the sheath is formed.
- the percussion piston can have a high kinetic energy by using a heavy core and the shell can be formed from a material which has good sliding properties.
- the jacket is formed in several parts and is radially removable from the core. The advantage here is that the jacket is easily separable from the core and can be replaced in case of maintenance.
- the multi-part jacket it is possible for the multi-part jacket to have a fixing projection on an inner side of the jacket, which cooperates with a receptacle in the core.
- the advantage here is that by this measure, the jacket can be secured to the core in its position.
- Materials with self-lubrication properties have a capability of allowing sufficient sliding bearing properties together with friction partners on adjacent sliding surfaces, even without the use of external lubricants. To form a self-lubricating property, therefore, it always depends on the right combination of two adjoining materials.
- Such materials with self-lubricating property for example, be a lead or tin alloyed material.
- suitable materials with self-lubricating property can be formed, for example, from a plastic material.
- the quill may be formed of aluminum material or an aluminum alloy.
- the piston, the hammer and the closure cover may be formed of a steel material or a steel alloy.
- Fig. 1 is a perspective view of an embodiment of a Entkernhammers
- Fig. 3 is a perspective half section of the Entkernhammers
- FIG. 4 shows an embodiment of a percussion piston.
- FIG. 5 shows a further embodiment of a percussion piston.
- Figure 8 is a half-section of the Entkernhammers, with the sleeve of the Entkernhammers is in its operating position and the percussion piston is in its retracted position.
- FIG. 9 shows a half section of a further embodiment of the decoring hammer.
- Fig. 1 shows a perspective view of a Entkernhammers 1, which serves for coring of cast workpieces.
- the decoring hammer 1 serves to be able to break the sand cores in the cast workpiece by vibration, or to be able to remove sand residues from the cast workpiece.
- the Entkernhammer 1 a housing 2, in which a
- Gas inlet opening 3 and a gas outlet opening 4 is arranged.
- the gas inlet opening 3 serves to supply compressed air to the Entkernhammer 1 to operate and in the gas outlet opening 4, the compressed air is discharged again.
- the housing 2 can have a housing main body 5, which can be formed from a continuous casting profile.
- an aluminum extruded cast profile is used for the housing main body 5.
- the housing main body 5 is formed as a hollow profile and is bounded by a first closure cap 6 and a second closure cap 7.
- a passage opening 8 is formed, through which protrudes a sleeve 9, which is accommodated in the housing 2.
- the decoring hammer 1 is shown in a half section, wherein the pinole 9 of the decoring hammer 1 is in its retracted basic position 10.
- Fig. 3 the Entkernhammer 1 is shown in a perspective view in a half section.
- the quill 9 of Entkernhammers 1 is in the view of FIG. 3 in a pushed forward insertion position 11.
- the housing main body 5 and the first cap 6 are hidden in Fig. 3.
- the individual components of the Entkernhammers 1 will be described below with reference to a combination of FIGS. 1 to 3.
- a hammer 12 is arranged on the quill 9, which serves to rest on the casting workpiece to be cored.
- a contact surface 13 of the striking piece 12 bears against the casting workpiece to be cored.
- the gas outlet opening 4 is arranged in the second closure lid 7.
- the gas outlet opening 4 is arranged in the striking piece 12, wherein in the hammering piece 12, a through hole may be formed.
- an air gap is formed, through which the air can escape.
- the hammer 12 is fastened by means of a mounting clamp 14 on the quill 9.
- the mounting bracket 14 may have two half-shells which are interconnected by means of a fastening means.
- the fastening clamp 14 has a fastening bead 15, which is accommodated in a fastening groove 16 of the sleeve 9.
- the mounting clamp 14 can be coupled axially immovable with the sleeve 9.
- a contact area 17 may be formed, on which the hammer 12 can be supported.
- the hammer 12 may be inserted into a hammer receiving space 18.
- the hammering piece 12 may have a hammering piece bead 19, which is received in a shoulder 20 of the hammer piece receiving space 18.
- the striking piece 12 is secured in the axial direction by the striking piece bead 19, which is delimited by the shoulder 20 of the hammer piece receiving space 18 and the contact area 17 of the fastening clip 14. Furthermore, it can be provided that between the shoulder 20 and the Schlag Westernwulst 19, a damping element 21 is arranged, which serves for vibration-promoting recording of the hammering piece 12 in the sleeve 9. A further damping element 21 can be arranged between the impact piece bead 19 and the contact area 17 of the fastening clip 14.
- the damping elements 21 can be designed in particular as an O-ring.
- the sleeve 9 has a Pinolenkopf 22 and a Pinolenkör- per 23, wherein a diameter 24 of the Pinolenkopfes 22 is greater than a diameter 25 of the sleeve body 23. Due to the difference in diameter between Pinolenkopf 22 and Pinolen stresses 23 is an annular surface 26th formed, which serves as an axial bearing surface.
- a return spring 27 is applied, through which the quill 9 is pressed into its basic position 10.
- the return spring 27 may extend between the annular surface 26 and the second closure lid 7.
- a percussion piston 29 is added in a receiving space 28 in the quill 9.
- the percussion piston 29 has a striking surface 30, which is trimmed to the striking piece 12 and which is provided for striking a striking piece surface 31 of the striking piece 12.
- the percussion piston 29 is received axially displaceable in the receiving space 28 of the sleeve 9 and during operation of the Entkernhammers 1 performs an axially oscillating movement and the impact surface 30 of the percussion piston 29 abuts on the striking piece surface 31 of the striking piece 12.
- a vibration can be caused on the contact surface 13 of the hammering piece 12.
- the impact surface 30 or the impact piece surface 31 may have a crowning.
- a sleeve jacket 32 is formed, in which a gas flow opening 33 is arranged.
- compressed air can be conducted from the outer shell side 34 of the sleeve shell 33 into the receiving space 28 of the sleeve 9.
- a flow recess 36 extending from the gas flow opening 33 to an end face 35 of the pinole head 22 is formed on the outer shell side 34 of the sleeve 9.
- the flow recess 36 is particularly well visible in Fig. 3.
- a bearing sleeve 37 is arranged, which serves to receive the percussion piston 29.
- the percussion piston 29 is slidably received in the bearing sleeve 37.
- the bearing sleeve 37 has a bearing sleeve jacket 38, which rests against the outer side 39 thereof in the receiving space 28 of the sleeve 9 and which has a sliding surface 41 on its inner side 40.
- the bearing sleeve 37 may be interchangeable received in the receiving space 28 of the sleeve 9 and thus serve as a wear part.
- the sliding surface 41 of the bearing sleeve 37 is formed of a material which has a self-lubricating property.
- the sliding surface 41 of the bearing sleeve 37 may in particular have a coating with improved sliding properties.
- the complete bearing sleeve 37 is formed of a material with improved sliding properties.
- the bearing sleeve 37 has an end wall 42 through which the percussion piston 29 protrudes.
- the end wall 42 may form a shoulder to the sliding surface 41 of the bearing sleeve 37.
- a passage opening 43 may be formed in the end wall 42.
- a gas flow opening 44 is formed in the bearing sleeve casing 38, which extends from the outer side 39 of the bearing sleeve casing 38 to the inner side 40 of the bearing sleeve casing 38.
- the gas flow opening 44 of the bearing sleeve 37 is fluidly connected to the gas flow opening 33 of the sleeve sleeve 32, whereby the compressed air guided in the gas flow opening 33 can be guided to the inner side 40 of the bearing sleeve sheath 38.
- the gas flow opening 44 of the bearing sleeve sheath 38 and the gas flow opening 33 of the sleeve sleeve 32 are preferably arranged congruent to one another. Furthermore, it can be provided that an at least partially encircling groove 45 is formed on the outer side 39 of the bearing sleeve sheath 38, which groove is arranged at the level of the gas flow opening 44 in the bearing sleeve 37. By providing the groove 45, even if the gas flow opening 44 of the bearing sleeve 37 is angularly twisted to the gas flow opening 33 of the linoleon 32, the compressed air can be passed.
- the groove 45 serves as a flow channel.
- the bearing sleeve 37 is positioned axially by the fact that the end wall 42 of the bearing sleeve 37 rests against a shoulder 46 in the receiving space 28 of the sleeve 9.
- the percussion piston 29 has a piston head 48 and a piston body 49, wherein a diameter 50 of the piston head 48 is greater than a diameter 51 of the piston body 49.
- a diameter 50 of the piston head 48 is greater than a diameter 51 of the piston body 49.
- an annular surface 52 between the piston head 48 and piston body 49th educated is provided.
- the piston head 48 is guided in the sliding surface 41 of the bearing sleeve 37 and that the piston body 49 projects through the passage opening 43 in the end wall 42 of the bearing sleeve 37.
- an annular space 47 can be formed between the annular surface 52 of the piston head 48 and the piston body 49 and between the end wall 42 of the bearing sleeve 37.
- the volume of the annular space 47 is different depending on the position of the percussion piston 29. 2, the percussion piston 29 is in its impact position 53, wherein the impact surface 30 of the percussion piston 29 rests against the striking piece surface 31 of the striking piece 12.
- the percussion piston 29 In a retracted position 54, the striking surface 30 and the striking piece surface 31 are distanced from one another.
- the percussion piston 29 alternates between the impact position 53 and the retraction position 54.
- an overpressure is alternately applied to an end face 55 of the piston head 48 and to the annular surface 52.
- the exact mechanisms will be described in more detail below.
- a flow channel 56 is formed in the percussion piston 29, .
- the flow channel 56 may in particular have a longitudinal bore 57, which is arranged in the center of the percussion piston 29 and a transverse bore 58, which extends to a lateral surface 59 of the piston body 49.
- the flow channel 56 of the percussion piston 29 serves to be able to conduct compressed air to the end face 55 of the piston head 48.
- a sealing plug 60 is provided, by means of which the bearing sleeve 37 is secured in the receiving space 28 of the sleeve 9.
- the sealing plug 60 is inserted into the receiving space 28 by means of a screw thread.
- the closure plug 60 is secured by means of a locking ring 61 against unscrewing.
- the sealing plug 60 is fastened with an adhesive and / or sealing compound in the receiving space 28.
- the space between the end face 55 of the piston head 48 and the plug 60 is also referred to as the upper percussion piston pressure chamber 62.
- a sensor 63 is arranged on the housing 2, by means of which the position of the sleeve 9 can be detected.
- a maximum extended position of the quill can be detected and thereby a shutdown criterion can be issued, through which the compressed air is switched off to avoid excessive stress on the Entkernhammers 1.
- a sensor 64 for detecting the position of the percussion piston 29 can be arranged on the housing 2.
- the sensors 63, 64 may be designed, for example, in the form of Hall sensors, by means of which the position of the quill 9 or of the percussion piston 29 can be detected through the housing 2. In addition, all other sensors can be used by means of which the position can be detected. Furthermore, it can be provided that at the gas outlet opening 4, a gas line 65 is connected, to which a pressure sensor 66 is arranged, by means of which the beat frequency of the percussion piston 29 can be determined. As is further apparent from FIG. 2, provision may be made for a sealing ring 73 to be arranged on the quill head 22. By means of the sealing ring 73 can be achieved that the sleeve 9 can be pressed by compressed air to the cast workpiece.
- one or more sealing rings 74 are arranged in the passage opening 8 of the second closure lid 7, the sealing rings 74 serve to seal or guide the sleeve body 23.
- the sealing rings 74 simultaneously for damping or spacing the Pinolen emotionss 23 serve to cover 7.
- a gap between Pinolen emotions 23 and closure cap 7 is sufficiently large, so that the sleeve body 23 is not applied to the closure cover 7 or even at vibration rubs on this. As a result, excessive wear or shrinkage of the pin body 23 in the region of the closure cap 7 can be largely avoided.
- FIG. 4 shows a further embodiment of the percussion piston 29, which is possibly independent of itself, wherein the same reference numerals or component designations are used again for the same parts as in the preceding FIGS. 1 to 3.
- the percussion piston 29 has a casing 67 in which a core 68 is arranged.
- the shell inside 69 is applied to the core 68 here.
- the outer shell side 70 abuts against the sliding surface 41 of the bearing sleeve 37.
- the core 68 has a greater density than the casing 67.
- FIG. 5 shows a further embodiment of the percussion piston 29, which is possibly independent of itself, again using the same reference numerals or component designations for the same parts as in the preceding FIGS. 1 to 4. To unnecessary To avoid repetition, reference is made to the detailed description in the preceding figures 1 to 4 or reference.
- the percussion piston 29 may have a casing 67 in which a core 68 is arranged.
- the shell inside 69 is here on
- Core 68 and the outer shell side 70 abuts against the sliding surface 41 of the bearing sleeve 37.
- the core 68 has a greater density than the casing 67.
- the casing 67 of the percussion piston 29 is subdivided into a plurality of segments, wherein these can have a fixing projection 71 , which is inserted into a recess 72 of the core 68 and thus the jacket 67 is secured axially immovable.
- the compressed air can be guided via the flow recess 36 and the gas flow openings 33 and 44 into the annular space 47, which can also be referred to as the lower percussion piston pressure chamber 76.
- a pressure is applied to the annular surface 52 between the piston head 48 and the piston body 49, as a result of which the percussion piston 29 is moved in the direction of its retracted position 54.
- This movement of the percussion piston 29 can be seen in the illustration in FIG.
- the percussion piston 29 is in an intermediate position between stroke position 53 and retracted position 54, wherein further the lower percussion piston pressure chamber 76th pressurized air is and the percussion piston 29 is pressed into its retracted position 54.
- the flow channel 56 in the percussion piston 29, in particular the transverse bore 58 is still covered in the position shown in FIG. 7 by the end wall 52 of the bearing sleeve 37.
- the flow channel 56 of the percussion piston 29 is released and the compressed air can flow from the lower percussion piston pressure chamber 76 into the upper percussion piston pressure chamber 62.
- the percussion piston 29 is moved downward by expansion of the gas stored in the upper pressure chamber 62 until the flow channel 56 of the percussion piston 29 below the end wall 42 is released.
- the compressed air stored in the upper percussion piston pressure chamber 62 can escape into an outflow chamber 77 and via a gas flow opening 78 in the sleeve 9 into the receiving space of the return spring 27 and from there via the gas outlet opening 4 from the decoring hammer 1. From this time acts a force which wants to push the percussion piston 29 back into its retracted position.
- Due to the inertia of the percussion piston 29 is further moved in its stroke position 53 until the impact surface 30 of the percussion piston 29 abuts the impact piece surface 31 of the striking piece 12.
- the hammer 12 is set in vibration. The process is now repeated oscillating as long as compressed air is fed into the decoring hammer 1 via the gas inlet opening 3.
- FIG. 9 shows a further embodiment of the decoring hammer 1, which may be independent of itself, wherein the same reference numerals or component designations are used again for the same parts as in the preceding FIGS. 1 to 8.
- the same reference numerals or component designations are used again for the same parts as in the preceding FIGS. 1 to 8.
- a guide ring 79 is formed which serves to guide the sleeve 9.
- both the gas inlet opening 3 and the gas outlet opening 4 are arranged in the housing main body 5.
- a closure disk 80 may be formed, which is arranged in the housing main body 5 in the region of the first closure lid 6.
- the shutter disk 80 may be secured in the casing main body 5 by means of an axial securing ring.
- a bedsstellfedernzent- tion 81 is formed on the second closure lid 7, which serves to receive the return spring 27.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50045/2017A AT519589A1 (de) | 2017-01-24 | 2017-01-24 | Entkernhammer zum Entkernen von Gusswerkstücken |
PCT/AT2018/060022 WO2018136986A1 (de) | 2017-01-24 | 2018-01-24 | Entkernhammer zum entkernen von gusswerkstücken |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3383567A1 true EP3383567A1 (de) | 2018-10-10 |
EP3383567B1 EP3383567B1 (de) | 2019-04-10 |
Family
ID=62044425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18719408.9A Active EP3383567B1 (de) | 2017-01-24 | 2018-01-24 | Entkernhammer zum entkernen von gusswerkstücken |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3383567B1 (de) |
CN (1) | CN110214062B (de) |
AT (1) | AT519589A1 (de) |
WO (1) | WO2018136986A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110479992B (zh) * | 2019-08-30 | 2021-06-22 | 潍坊雷腾动力机械有限公司 | 一种发动机腔壳模土敲击锤 |
CN112264603A (zh) * | 2020-10-23 | 2021-01-26 | 杭州佳顿智能科技有限公司 | 一种新能源汽车压缩机缸盖制造加工系统 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3446294A (en) * | 1966-03-14 | 1969-05-27 | Joy Mfg Co | Percussion tool |
US4947941A (en) * | 1986-10-21 | 1990-08-14 | Institut Gornogo Dela Sibirskogo Otdelenlja Akademii Nauk Sssr | Single-stroke pneumatic apparatus |
JPH07323368A (ja) * | 1994-06-02 | 1995-12-12 | Seisan Gijutsu Kenkyusho:Kk | エアハンマユニット |
FR2742365B1 (fr) * | 1995-12-13 | 1998-01-16 | Outils Pneumatiques Globe | Ensemble pneumatique a approche et frappe combinee, unite de dessablage comportant un tel ensemble, installation de dessablage comportant une telle unite, et procede de pilotage d'une telle installation |
GB2313801B (en) * | 1996-06-05 | 2000-01-26 | Standall Tools Ltd | A tool |
US6691798B1 (en) * | 2002-06-19 | 2004-02-17 | Steven James Lindsay | Variable hand pressure activated power tool |
DE102004047606A1 (de) * | 2004-09-30 | 2006-04-06 | Hilti Ag | Bohr- und/oder Meisselhammer |
FR2888140B1 (fr) * | 2005-07-08 | 2007-09-14 | Outils Pneumatiques Globe Sa | Ensemble pneumatique pour installation de dessablage des noyaux de fonderie |
CN201651289U (zh) * | 2010-04-16 | 2010-11-24 | 陕西法士特齿轮有限责任公司 | 一种汽车变速器气缸 |
WO2012016754A1 (de) * | 2010-06-24 | 2012-02-09 | Mtu Aero Engines Gmbh | Nadler zur lokalen oberflächenbearbeitung von bauteilen |
AT513442A1 (de) * | 2012-10-10 | 2014-04-15 | Fill Gmbh | Rüttelhammer mit Rückschlagdämpfung |
CN106573297B (zh) * | 2014-06-09 | 2018-10-30 | 欧姆乐2000有限公司 | 用于对翻砂铸件除芯的具有一体式传感器的除芯振动器或气锤 |
-
2017
- 2017-01-24 AT ATA50045/2017A patent/AT519589A1/de not_active Application Discontinuation
-
2018
- 2018-01-24 EP EP18719408.9A patent/EP3383567B1/de active Active
- 2018-01-24 WO PCT/AT2018/060022 patent/WO2018136986A1/de active Application Filing
- 2018-01-24 CN CN201880008279.4A patent/CN110214062B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
EP3383567B1 (de) | 2019-04-10 |
WO2018136986A1 (de) | 2018-08-02 |
CN110214062A (zh) | 2019-09-06 |
CN110214062B (zh) | 2022-02-01 |
AT519589A1 (de) | 2018-08-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102007054224A1 (de) | Fluiddruckzylinder | |
DE29711704U1 (de) | Bohr- und/oder Meißelgerät | |
DE19827172A1 (de) | Werkzeughalter | |
WO2002020224A1 (de) | Werkzeughalterung für eine handwerkzeugmaschine | |
DE102007058630A1 (de) | Fluiddruckzylinder | |
DE2730567B2 (de) | Ventilanordnung für Druckluftschlagwerke | |
DE19580861B4 (de) | Hydraulisches Spielausgleichselement für die Ventilsteuerung von Brennkraftmaschinen | |
DE102007058629A1 (de) | Haltering für Fluiddruckzylinder | |
DE2111234B2 (de) | Schlagmeißel- oder Schlagbohrmaschine | |
EP0472982A2 (de) | Hydraulisch betriebene Schlagdrehbohrvorrichtung, insbesondere zum Ankerlochbohren | |
EP3383567A1 (de) | Entkernhammer zum entkernen von gusswerkstücken | |
DE202005005912U1 (de) | Druckgasbetriebene Schusswaffe | |
DE2750472A1 (de) | Einstellbare vorrichtung zur absorption kinetischer energie | |
DE102006018084B4 (de) | Lagertragstruktur für Stellglied | |
DD285569A5 (de) | Hydraulisches schlagwerkzeug | |
DE10230991A1 (de) | Werkzeugaufnahme für eine Werkzeugmaschine | |
DE102019120427A1 (de) | Bohrungsspanner | |
DE202009002899U1 (de) | Spanneinrichtung | |
DE3917155A1 (de) | Pneumatische schlagmaschine | |
DE10243288B4 (de) | Werkzeugaufnahme | |
DE10153159B4 (de) | Ventil | |
DE10202648A1 (de) | Halterung für die Innendichtung an einem fluidbetriebenen Schlagwerk | |
DE9313280U1 (de) | Hydraulischer Stoßdämpfer | |
DE8717987U1 (de) | Werkzeug zum Entfernen des Einbauzapfens eines Drahtgewindeeinsatzes | |
DE1478839C3 (de) | Abfangeinrichtung für den mit einem Kolbenschaft und Kolbenkopf versehenen Eintreibkolben eines Brennkraftbolzensetzers |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20180705 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B25D 17/06 20060101ALI20181023BHEP Ipc: B22D 29/00 20060101AFI20181023BHEP Ipc: B25D 17/26 20060101ALI20181023BHEP |
|
INTG | Intention to grant announced |
Effective date: 20181112 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: AT Ref legal event code: REF Ref document number: 1118006 Country of ref document: AT Kind code of ref document: T Effective date: 20190415 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502018000018 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20190410 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190910 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190711 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190810 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502018000018 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 |
|
26N | No opposition filed |
Effective date: 20200113 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20200131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200124 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200124 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210131 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20220124 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220124 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190410 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 1118006 Country of ref document: AT Kind code of ref document: T Effective date: 20230124 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230124 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230124 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20240108 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20240116 Year of fee payment: 7 Ref country code: FR Payment date: 20240111 Year of fee payment: 7 |